Yeah, people blocking door way gets me killed alot.
I played many hours of FT yesterday and people blocking off an escape route was my number one cause of death. The stairs down to Bravo Site were the worst. You don't get just ONE guy blocking you; you get 3-4! Are people just that stupid??? Wait...am I just stupid for not letting them go first? LOL
Also, when the target is A, it's sometimes easier to actually move like you're going for B, then come at Alpha Site from the side. Allegedly, this causes fewer Rocketman spawns. The problem is that everyone is yelling at you for going the wrong way. Three times yesterday, when the target was A, I went via B. I cleared out every bad guy along the way, all by myself. The other 7 people went right to A. When they all died, I got the blame, because I went the "wrong" way.
Unfortunately, 2 of the 3 times I died also, but during one of them I was able to get the intel and get to the extraction point alone, with the rest typing "orders" and "instructions" the whole time.